/Engine/Source/Editor/Sequencer/Public/ISequencerModule.h
Get the sequencer customization manager, which handles editor customizations applied based on the currently focused sequence type and other dynamic criteria.
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FSequencerCustomizationManager](API\Editor\Sequencer\FSequencerCustomizationManager) > GetSequencerCustomizationManager() const